Refactor & improve public API

api/.eslintrc.json

@@ -0,0 +1,17 @@
+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "ignorePatterns": ["node_modules/", "dist/", "webpack.*.js"],
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "@typescript-eslint/no-unused-vars": ["error", { "ignoreRestSiblings": true }]
+  }
+}